欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
以DK膜为研究对象，以透过式流动电位测试系统为分析手段，采用动电法研究聚酰胺类纳滤膜的界面电现象。根据Helmholtz-Smoluchowski方程和Gouy-Chapman模型系统地考察了电解质溶液浓度和离子种类、价态等因素对膜ζ电位和电荷密度的影响。研究发现，在一定浓度范围内，DK型纳滤膜的电荷密度与电解质溶液浓度之间符合Freundlich吸附等温式，其中对于Na2SO4溶液：ln｜σ｜（mC／m^2）=2．436＋0．505lnC（mol／m^3）；对于MgSO4溶液：ln｜σ｜（mC／m^2）=-0．539＋1．412lnC（mol／m^2）；对于KCl溶液：ln｜σ｜（mC／m^2）=-0．140＋0．280lnC（mol／m^3）；对于CaCl，溶液：ln｜σ｜（mC／m^2）=-2．287＋1．105lnC（mol／m^3）。结果表明，电解质溶液中阴离子的特性吸附是聚酰胺类纳滤膜荷电现象产生的主要原因。
英文摘要：
Experimental investigations on interracial electrical phenomena of DK membrane were performed using electrokinetic method. The zeta potentials and charge densities of the DK membrane in different electrolyte solutions were estimated on the basis of Helmhohz-Smoluchowski equation and Gouy-Chapmann doubleelectric layers theory. The experimental results show that the factors, such as concentration of electrolyte solution, the type and the valences of ions, have important influences on the charged behavior of the DK membrane. The relationship between the charge densities, σ, and the feed solution concentration, C, agrees well with Freundlich absorption isotherms under certain testing conditions. That is, for Na2SO4 solution： ln ltrl （mC/m^2） = 2. 436 ＋ 0. 505 lnC（moL/m^3 ）; for MgSO4 solution： in ln｜σ｜（ mC/m^2 ） = - 0. 539 ＋ 1. 412 lnC （ mol/m^3 ） ; for KCl solution：ln｜σ｜（ mC/m^2 ） = - 0.140 ＋ 0. 280 lnC （ mol/m^3 ） ; for CaCl2 solution： ln｜σ｜（ mC/m^2） = - 2. 287 ＋ 1. 105lnC（ mol/m^3 ）. It is reasonable to think that the surface charge of DK membrane came into being mainly resulting from the specific adsorption of anions.
同期刊论文项目
同项目期刊论文
Integration of conventional electrodialysis and electrodialysis with bipolar membranes for productio
The energy-saving production of tartaric acid using ion exchange resin-filling bipolar membrane elec
Hybrid anion exchange hollow fiber membranes through sol-gel process of different organic silanes wi
Preparation of bromomethylated poly(2,6-dimethyl-1,4-phenylene oxide) hollow fiber cation-exchange m
Development of a Novel Hollow Fiber Cation-Exchange Membrane from Bromomethylated Poly(2,6-dimethyl-
Bromomethylated poly(2,6-dimethyl-1,4-phenylene oxide) (BPPO)-based amphoteric hollow-fiber membrane
A simple heat treatment to prepare covalently crosslinked membranes from sulfonated poly(2,6-dimethy
Anion exchange hybrid membranes from PVA and multi-alkoxy silicon copolymer tailored for diffusion d
Fundamental studies of a new series of anion exchange membranes: Membranes prepared through chloroac
Novel silica/poly(2,6-dimethyl-1,4-phenylene oxide) hybrid anion-exchange membranes for alkaline fue
Fundamental Studies of a New Series of Anion Exchange Membranes: Membranes Prepared from Bromomethyl
Catalytic water dissociation at the intermediate layer of a bipolar membrane: The role of carboxylat
Novel anion-exchange organic-inorganic hybrid membranes prepared through sol-gel reaction of multi-a
A novel route for the preparation of hybrid zwitterionic membranes containing both sulfortic and car
Simultaneous regeneration of formic acid and carbonic acid from oxalate discharge by using electrodi
Preparation and characterization of Type II anion exchange membranes from poly(2,6-dimethyl-1,4-phen
A simple evaluation of microstructure and transport parameters of ion-exchange membranes from conduc
Poly(2,6-dimethyl-1,4-phenylene oxide) (PPO)-A versatile starting polymer for proton conductive memb
Application of electrodialysis to the production of organic acids: State-of-the-art and recent devel
Catalytic water dissociation using hyperbranched aliphatic polyester (Boltorn (R) series) as the int
Electrochemical impedance spectroscopy analysis of sulfonated polyethersulfone nanofiltration membra
The investigation on overall charged behavior of polyamide nanofiltration membrane by electrokinetic
Feasibility study on surface modification of cation exchange membranes by quaternized chitosan for i
位置：